I installed 1.74.8 and run into the following problem with Z9:

It generates
Error 055: CSJ 0 (Z9.t6) history missing
and this for all assets. So also the file referred to
Z9.t6 is the same for all assets.

This error is odd because it only appears in Trade mode. The history of the assets in assetsZ9.csv is available and things work in Testmode. Why does it quote the file Z9.t6. Something seems broken.